NEW YORK (Reuters) – The baby’s cries are a cry of pain, it’s a cry for attention and it’s often accompanied by the sound of crying babies, according to a study published on Wednesday in the journal PNAS.
The study, published in the peer-reviewed journal Science, compared cry responses in babies and non-babies.
The study found that crying babies respond more strongly to their cries when their parents are crying, which may explain why parents of infants are more likely to cry at home.
The researchers, from the University of Washington and the University at Buffalo, said the results support the theory that crying infants respond to emotional cues and signals more strongly when their mothers are crying.
The study was funded by the National Institutes of Health and the National Science Foundation.
Baby crying can also be used to trigger the production of cortisol, which causes stress and anxiety in humans, the study found.